Class: Jekyll::Csvy

Inherits:
Converter
  • Object
show all
Defined in:
lib/jekyll-csvy.rb

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Csvy

Returns a new instance of Csvy.



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# File 'lib/jekyll-csvy.rb', line 8

def initialize(config)
  Jekyll::External.require_with_graceful_fail "jekyll-pandoc"

  # requires the Pandoc markdown converter
  # install jekyll-pandoc gem and set "markdown: Pandoc" in _config.yml
  unless config["markdown"] == "Pandoc"
    raise Jekyll::Errors::FatalException, "Pandoc markdown converter required"
  end

  @config = config
end

Instance Method Details

#content_rows(row, max_widths, max_height) ⇒ Object 



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# File 'lib/jekyll-csvy.rb', line 65

def content_rows(row, max_widths, max_height)
  content_row = []
  0.upto(max_height - 1) do |j|
    content_row << row.each_with_index.reduce("|") do |sum, (x,i)|
      sum + ' ' + x.lines[j].to_s.chomp + ' ' * (max_widths[i] - x.lines[j].to_s.chomp.length) + " |"
    end
  end
  content_row
end

#convert(content) ⇒ Object 



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# File 'lib/jekyll-csvy.rb', line 28

def convert(content)
  # convert csv content into markdown table using grid table format
  content = convert_csv(content)

  # convert grid_tables markdown into HTML table using pandoc
  site = Jekyll::Site.new(@config)
  markdown_converter = site.find_converter_instance(Jekyll::Converters::Markdown)
  markdown_converter.convert(content)
end

#convert_csv(content) ⇒ Object 



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# File 'lib/jekyll-csvy.rb', line 38

def convert_csv(content)
  rows = ::CSV.parse(content)

  # calculate max height of each row
  max_heights = rows.map { |r| r.max_by { |x| x.lines.count }}.map { |r| r.lines.count }

  # calculate max width of each column
  columns = rows.transpose
  max_widths = columns.map { |c| c.max_by { |x| x.length }}.map { |c| c.length }

  # header
  table = []
  table << separator_row(rows.first, max_widths)

  # rows
  rows.each_with_index do |row,i|
    delimiter = i == 0 ? "=" : "-"

    table += content_rows(row, max_widths, max_heights[i])
    table << separator_row(row, max_widths, delimiter)
  end

  table.join("\n") + "\n"
rescue => e
  raise Jekyll::Errors::FatalException, "Conversion failed with error: #{e.message}"
end

#matches(ext) ⇒ Object 



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# File 'lib/jekyll-csvy.rb', line 20

def matches(ext)
  ext =~ /^\.csvy$/i
end

#output_ext(ext) ⇒ Object 



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# File 'lib/jekyll-csvy.rb', line 24

def output_ext(ext)
  ".html"
end

#separator_row(row, max_widths, delimiter = "-") ⇒ Object 



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# File 'lib/jekyll-csvy.rb', line 75

def separator_row(row, max_widths, delimiter = "-")
  row.each_with_index.reduce("+") do |sum, (x,i)|
    sum + delimiter * (max_widths[i] + 2) + "+"
  end
end